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  <h2><strong>The main idea is to simulate processes that going in intersellar 
    clouds using stochastic approach</strong>. </h2>
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<p> <strong>The system has next parameters:</strong></p>
<ul>
  <li>Cloud </li>
  <li>Volume </li>
  <li>Dnsity </li>
  <li>Age</li>
  <li>Temperature</li>
  <li>Hydrogen abundance</li>
  <li>Oxygen abundance</li>
  <li> . . . </li>
  <li>Carbon abundance</li>
  <li>Grain size and density </li>
</ul>
<p><strong>Next idea is: <br>
  We are having specified reactions and distributions from which we are getting 
  probabilities of certain reaction to happen.</strong></p>
<p>i.e. each chemical reaction is specified by:</p>
<ul>
  <li>Atoms that react.</li>
  <li>Molecules that reacts.</li>
  <li>Product of the reaction.</li>
  <li>Time need to happen.</li>
  <li>Temperature (maybe different raits for different temperatures)</li>
  <li>Energy?</li>
</ul>
Now, to say about probability of this reaction to happen, we need to calculate 
it using all those parameters and also probabilities that atoms that react presented 
in the time of reaction. Maybe here is rational to use model that will calcurate 
arrival rate for those atoms? 
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